数值模拟在砂岩型铀矿流体运移机制研究中的应用  

Application of Numerical Modeling in the Study of Fluid Flow Mechanism Related to Sandstone-type Uranium Deposits

作　　者：韦晓艳 李增华 杜鹏飞 严兆彬[2] 于炳飞 李胜苗 刘传东 WEI Xiaoyan;LI Zenghua;DU Pengfei;YAN Zhaobin;YU Bingfei;LI Shengmiao;LIU Chuandong(Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology,East China University of Technology,Nanchang,Jiangxi 330013,China;School of Earth Sciences,East China University of Technology,Nanchang,Jiangxi 330013,China;Geologic Party No.208,CNNC,Baotou,Inner Mongolia 014010,China;Institute of Geological Survey,Central South Bureau of China Metallurgical Geology Bureau,Wuhan,Hubei 430080,China;Geology Survey Institute of Hunan Province,Changsha,Hunan 410016,China)

机构地区：[1]东华理工大学江西省放射性地学大数据技术工程实验室,江西南昌330013 [2]东华理工大学地球科学学院,江西南昌330013 [3]核工业二〇八大队,内蒙古包头014010 [4]中国冶金地质总局中南地质调查院,湖北武汉430080 [5]湖南省地质调查院,湖南长沙410016

出　　处：《铀矿地质》2022年第1期106-114,共9页Uranium Geology

基　　金：江西省放射性地学大数据技术工程实验室开放基金项目“基于机器学习的鄂尔多斯盆地砂岩型铀矿床成矿预测研究”(编号:JELRGBDT202006);国家自然科学基金面上项目“鄂尔多斯盆地北部砂岩型铀矿古层间氧化成因机制研究”(编号:40272099)联合资助。

摘　　要：砂岩型铀矿是一种主要赋存于盆地砂岩中的后生铀矿床。流体的运移在铀成矿过程中起到关键作用,是铀活化、迁移和富集的主要介质,因此流体运移机制的研究对于建立成矿模型具有重要意义。文章首先阐述了盆地流体的一般运移机制,再梳理了国内外数值模拟在砂岩型铀矿流体运移机制中的研究现状,最后通过数值模拟实例分析,研究盆地在隆升过程中对流体运移的影响。研究表明,流体动力学数值模拟是研究砂岩型铀矿流体运移机制的有效手段,能够为成矿规律的研究提供技术支持。Sandstone-type uranium deposits are epigenetic concentrations of uranium primarily in fluvial,lacustrine,and deltaic sandstone formations,fluids play critical roles in the ore-forming processes.Fluids are the media of uranium mobilization,migration and precipitation.It is very important to study the hydrodynamics of oreforming processes in order to build the ore genesis model.This paper first summarized the common driving forces in the basin settings.Then analyzed the numerical modeling researches of fluid flow related to sandstone-type uranium deposits.Finally,numerical modeling was used to study the effects of tectonic uplift on fluid flows.The results showed that hydrodynamic modeling is an effective method to study the mechanisms of fluid flow related to sandstone-type uranium deposits,which can provide support to the study of metallogenic regularity.

关 键 词：砂岩型铀矿 盆地流体 运移机制 流体动力学 数值模拟 

分 类 号：P641[天文地球—地质矿产勘探] P611[天文地球—地质学]